The European Telecommunications Standards Institute (ETSI) standardised GSM and UMTS. The standardisation for UMTS was organized differently around 1999 through the ​3rd Generation Partnership Project (3GPP). The projects that are part of Osmocom currently focus on the last release before the inclusion of UMTS. In standards release terminology this is roughly R99 and follows the old-style specification numbering (01.xx - 12.xx). The release numbering is described on ​this page, while the specification numbering schemes are explained on ​this page at 3GPP.